By Guy Taylor Trainline investors will get a first indication of the ticket seller’s 2024 performance in a trading update next Thursday. Shares in Trainline have risen over 20 per cent in the last 12 months amid booming ticket sales, particularly in Europe. The FTSE 250 firm netted £2.6bn from ticket sales in its November half-year results, a 23 per cent year-on-year rise that pushed revenues to £197m. That came despite a £66m hit from ongoing industrial action, which has proven a big headwind for the company in the past. The bumper results were followed up in December by news the government h…